| psi | Pounds force of pressure per square inch. (05 Dec 1998) |
|---|---|
| psi factor | A protein responsible for the specific initiation of the RNA polymerase-catalyzed reaction at the promoter sites of genes. (05 Mar 2000) |
| psi phenomenon | A phenomenon that includes both psychokinesis and extrasensory perception; the extrasensory mental processes involved in the alleged ability to send or receive telepathic messages. (05 Mar 2000) |
| psia | Pounds force of pressure per square inch absolute (including atmospheric pressure). (05 Dec 1998) |
| psicose | Ribo-2-hexulose;a ketohexose; d-psicose is epimeric with d-fructose. Synonym: pseudofructose, ribo-2-hexulose. (05 Mar 2000) |
| psig | Pounds force of pressure per square inch gauge (excluding atmospheric pressure). (05 Dec 1998) |
| psilocin | 3-[2-(Dimethylamino)ethyl]indol-4-ol;a hallucinogenic agent related to psilocybin. (05 Mar 2000) |
| Psilocybe | A genus of mushrooms (family Agaricaceae) containing many species with psychotropic or hallucinogenic properties, including Psilocybe mexicana, of which the fruiting bodies are a source of the hallucinogen, psilocybin. (05 Mar 2000) |
| psilocybin | 3-(2-dimethylamino)ethylindol-4-ol dihydrogen phosphate;the N',N' -dimethyl derivative of 4-hydroxytryptamine; obtained from the fruiting bodies of the fungus Psilocybe mexicana and other species of Psilocybe and Stropharia. Psilocybin is a congener of 5-hydroxytryptamine, with striking central nervous system effects, and is readily hydrolyzed to 4-hydroxybufotenine; used as a hallucinogenic agent (and by Mexican aborigines to induce trances). Synonym: indocybin. (05 Mar 2000) |
| psilocybine | <chemical> The major of two hallucinogenic components of teonanacatl, the sacred mushroom of mexico, the other component being psilocin. Pharmacological action: hallucinogens. Chemical name: 1H-Indol-4-ol, 3-(2-(dimethylamino)ethyl)-, dihydrogen phosphate (ester) (12 Dec 1998) |
| psilology | Love of empty of empty talk or noise. Origin: Gr mere. Source: Websters Dictionary (01 Mar 1998) |
| psilomelane | <chemical> A hydrous oxide of manganese, occurring in smooth, botryoidal forms, and massive, and having an iron-black or steel-gray colour. Origin: Gr. Bare +, black. Source: Websters Dictionary (01 Mar 1998) |
| psilopaedes | <ornithology> Birds whose young at first have down on the pterylae only. Synonym: Gymnopaedes. Origin: NL, from Gr. Bare +, offspring. Source: Websters Dictionary (01 Mar 1998) |
| psilopaedic | <ornithology> Having down upon the pterylae only; said of the young of certain birds. Source: Websters Dictionary (01 Mar 1998) |
| psilosis | Falling out of the hair. Origin: G. Psilosis, a stripping, fr. Psilos, bare (05 Mar 2000) |